NYC recently banned restaurants from using trans fat. Lots of packaged foods and spreads stopped including trans fats. But many are replacing it with a worse fat: interesterified fat. (wikipedia entry). It makes bad cholesterol go up more than saturated fat, and maybe more than trans fat. Here is an article: http://my.brandeis.edu/news/item?news_item_id=7674 http://www.theheart.org/article/765927.do This is so terrible! All these replacements end up worse than the original. :sButter is so much better for you than this stuff. On another note, diet soda is supposed to cause more metabolic problems than regular soda.